Ventilator



MR Am m m .O Rm .V J d 0 M o w Patented Feb. 9, 1897.

Event m:

- flwaaea:

Jim/7 m: NORRIS nmns cu. mowurua. WASNING NiTEn ATE-S PATENT "OFFICE...

JAMES F. OGARA, OF CHARLESTON, SOUTH CAROLINA.

VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 576,791, dated February9, 1897.

Application filed Januar 23, 1896.

To all whom, it may concern:

Be it known that 1, JAMES F. OGARA, a citizen of the United States,residing at Charleston, in the county of Charleston and State of SouthCarolina, have invented certain new and useful Improvements inVentilators; and I do hereby declare the following to be a full, clear,and eXact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention has relation to ventilators, and has for its object theprovision of a ventilator of novel form and construction adapted to beapplied to buildings, mines, ships, railway-cars, or other places, andto be operated by either withdrawing foul air and allowing fresh air tosupply its place or by forcing fresh air directly into the place to beventilated.

My invent-ion consists in a ventilator composed of a revolving cap orcowl which is mounted upon the top of a ventilating-pipe and providedwith a vane and with an opening on one side, to which is fitted asliding door, by means of which the opening in the ventilator may bepartially or wholly closed.

My invention further consists inthe combination, with a ventilatorcomposed of a revolving cap or cowl which is mounted upon the top of aventilating-pipe, of an adj ustable vane adapted to be shifted from thefront to the rear of the revolving cowl, or vice versa.

My invention still further consists in the novel constructiomcombination,an d arrangement of parts hereinafter described and claimed.

Referring to the accompanying drawings, Figure 1 is a perspective viewof my improved ventilator, the sliding door being open. Fig. 2 is anelevation of the same with the sliding door closed and locked. Fig. 3 isa top view, and Fig. 4 a vertical sectional view.

A designates the ventilating-pipe, upon which the ventilator is mounted,and B an upright spindle upon which the ventilator is pivotallysustained.

The ventilator consists of a cylindrical section of sheet metal 0,having upon its top a vane D, which is of substantially T shape and ispivotally secured between vertical Serial No. 576,572. (No model.)

have each one end secured, respectively, to

the two ends of the cross-arm of the T-shaped vane D. The chains orcords d d are guided and kept in proper position with relation to thepulleys D D by eyes d d and depend through holes (1 d into the interiorof the cowl and are provided with rings 61 d for the.

accommodation of a hook by which the chains are pulled from within theventilatingpipe to change the position of the vane. chains or cords d d,it will be observed, pass down into the cowl on opposite sides of thecenter of the same, so that when the vane is in one position the chainor cord which is attached to the end of the cross-arm of the vane whichis projecting downwardly at that position rests upon top of its pulley D,while the chain which is attached to the upwardlyprojecting arm of thevane hangs loose in its eye d. Now if the chain which is passing overthe pulley be pulled down from within the cowl the vane will be drawnover until it assumes a position slightly beyond an upright one, and thepull 011 the chain being then relaxed the vane will drop down'on theopposite side of the cowl, thus causing the chain on the opposite sideto rest upon top of the pulley, while the chain previously in actionwill hang loosely in its eye. One side of the cylindrical section 0 isopen, the material being turned back to form a flap E. Upon each side ofthe opening and extending around toward the other side of the ventilatorare plates of metal F F, which have flanged edges f f, that form tracksfor a sliding door G.

The edge of the door adjacent to the opening in the front of theventilator is turned back, so as to form a flap G, projecting outwardlyat the same angle from the ventilator as the flap E, on the other sideof the opening, the said flaps E and G serving to direct the air intothe opening in the ventilator, and serving also as a means forattachment of the locking device for the sliding door, the flap E beingprovided with a turn-button e, which passes through a hole g in the flapGr The when the sliding door is closed, and which, being turned around,serves to keep the said sliding door locked. A handle H is placed uponthe outside of the sliding door, and a block it at the back of theventilator serves to stop the sliding door at the proper position whenit is open.

In order to adapt the ventilator specially for use on railwaycars, inorder to exclude dust and einders, I have provided a screen which iscomposed of a metallic frame I and a suitable wire-gage center I. Thisscreen is placed within the opening of the cowl, the frame I being compressed so as to pass through the opening, and is held in position bypins 11 i on the frame, which rest in hooks t" 2" within the cowl.

here the ventilator is to be used aboard ship, the screen may beomitted, as may also the chains or cords for reversing the position ofthe vane from within the ventilator, since on board ship the vane isreadily accessible from the deck.

The ventilator above described operates generally in the manner ofrevolving ventilatorsthat is to say, the vane on the top of therevolving section serves to keep the opening in the side of the samefaced toward the wind when the ventilator is operated upon the direct orplenum method, or if the ventilater is operated according to the vacuummethod the vane will be so arranged that the opening in the side of theventilator will be always turned away from the wind.

The sliding door serves as a ready means for tightly closing theventilator in stormy or rainy weather, and the whole constitutes I acomplete, simple, and effective ventilator equal in effectiveness toventilators of ordinary form and having the additional advantage that itmay be tightly closed when desired, so as to effectually exclude eitherwind or rain from the ventilating-pipe.

Having described my invention, I claim- 1. A revolving ventilator havingan opening on one side with a flap at the edge in combination with adoor adapted to close said opening and having a corresponding flap atits edge and a catch or look for fastening said door in its closedposition, substantially as described.

2. In a ventilator, the combination of the revolving cylindrical sectionC, having an opening with a flap E, at one side, and a sliding door G,having a flap G, corresponding in shape and position to the flap E,substantially as described.

The combination with a revolving cylindrical ventilator-cowl, of ahorizontally-pivoted vane movable in a vertical plane and adjustablefrom front to rear of said cowl, substantially as described.

l. In a revolving ventilator, the combination with the cow], of a vanehorizontally pivoted on top of the same and movable in a vertical planeand means substantially as described for moving said vane todiametrically opposite sides of the cowl, as set forth.

5. In a revolving ventilator, the combina- 3 tion with the cowl, ahorizontally-pivoted vane and vertical guiding-plates embracing the vaneof chains attached to opposite sides of the vane and passing overbearings on said guiding-plates and into the cowl, substantially asdescribed.

In testimony whereof I ai'lix my signature i in presence of twowitnesses.

JAMES F. ()"GARA.

\Vitnesses:

JNo. W. BUNNES'JTER, J. L. HUMBERT.

